QuantConnect

QuantConnect is a platform that allows users to create, test, and deploy investment algorithms using historical market data. It provides tools for algorithmic trading, enabling both beginners and experienced traders to build strategies using programming languages like C# and Python. Users can simulate their strategies against past market conditions to see how they would have performed before trading with real money. The platform supports various asset classes, including stocks, options, and cryptocurrencies, making it a versatile resource for those interested in quantitative finance and automated trading.